Clown loach changed to nocturnal?

[105man]

I have had two clown loaches in a community tank for over a year, all fish doing well. The loaches had always been very active, swimming at all levels, together. For over a month now, though, there is only one that is usually out during daylight hours (really, the 12 hrs the light is on). Once in a while the other comes out (from hiding in a rock or decoration), and they both appear perfectly healthy.

Is a change to a nocturnal pattern typical? Any ideas about what's gone on?

Thanks.

 

[1tankneverenuff]

I can't say much except that mine have always seem to be nocturnal since the day I got them.

 

[cpn_aaron]

I agree with 1tank. You're very lucky. I have a dojo loach who's a 6 inch monster I got as a deal from my LFS about 5 months ago. He hides in his cave all day and only comes out after dark or when I feed first thing in the morning. He hides, but comes out and swims when I turn out the tank light, so I usually keep evening lights in my living room dim and turn his light out so can get a good look at him now and again.
On an unrelated note, I'd keep any laoch away from planted aquariums. Mine is in a nice palnted community tank and he is heck on my swords and ferns. But he fits in there, so I'll let him stay.

 

[mogurnda]

Clown loaches can be extremely moody. Change anything they'll hide for a month. They also hate bright lights. Mine generally won't come out when the main light is on, but are like puppies when the 13 watt dawn/dusk light is on by itself. Ate from my fingers last night.

So, any changes in light or the arrangement of the tank lately?